M2R converts a markdown file including reST markups to a valid reST format.

Features:
* Basic markdown and some extensions
  o inline/block-level raw html
  o fenced-code block
  o tables
  o footnotes ([^1])
* Inline- and Block-level reST markups
  o single- and multi-line directives (.. directive::)
  o inline-roles (:code:`print(1)` ...)
  o ref-link (see `ref`_)
  o footnotes ([#fn]_)
  o math extension inspired by recommonmark
* Sphinx extension
  o add markdown support for sphinx
  o mdinclude directive to include markdown from md or reST files
